import java.util.Scanner;

/**
 * @author: gao
 * @create-date: 2025/3/8 12:24
 */

public class Solution {
    public String toLowerCase(String s){
        char[] ch = s.toCharArray();
        for (int i = 0; i < s.length(); i++) {
            ch[i] = Character.toLowerCase(ch[i]);
        }
        return new String(ch);
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while(in.hasNextLine()){
            String s = in.nextLine();
            Solution solution = new Solution();
            System.out.println(solution.toLowerCase(s));
        }
    }
}
